Carburetor is one of the most important motorcycle systems. The performance of the vehicle itself, as well as the durability of its operation, depend on the correctness of its operation. Therefore, when choosing this element of the system, drivers pay attention to the device and the principles of its configuration.
If there is a K-68 carburetor on the motorcycle, it is not difficult to carry out the adjustment procedure on your own. In this case, the engine will start quickly, and the speed will become stable. In this case, the mixture of gasoline with air in the correct proportion will begin to flow into the engine.
general characteristics
The K-68 Pekar carburetor is in great demand among owners of motorcycles of domestic production. The equipment presented is manufactured by the Fuel Systems LLC plant in St. Petersburg. Production was focused on domestic engineering enterprises. The main consumers of their products were VAZ, PAZ, Gazelle, Volga, etc.
The Baker series of carburetors includes devices for cars and motorcycles. This is a new generation of equipment. The differences are in the design and functional characteristics of the presented carburetors. Also among motorists, they are known for their efficiency. Therefore, the demand for the presented devices has not been declining for many years.
Correct adjustment of the K-68 carburetor can reduce gas mileage by up to 20%. At the same time, the performance of the motor is significantly improved. The carburetor of the presented series, according to expert and consumer reviews, is distinguished by good performance. Reasonable cost makes the presented products competitive. Therefore, K-68 carburetors today are in great demand.
Types of settings
When choosing a carburetor for Ural , Dnipro, IZH and other brands of domestic motorcycle manufacturers, most users prefer the K-68 model. Moreover, buyers are trying to purchase the original equipment manufactured by the aforementioned factory.
The correct operation of the engine in various modes depends on the operation of the carburetor. Therefore, when preparing the fuel mixture, it is required to maintain a certain proportion of air and gasoline. With violations in this system, failures occur in other systems and mechanisms. Therefore, the driver must control the ratio in the mixture of fuel and air.
In order for the process to proceed correctly, it is necessary to ensure the correct adjustment of various devices. These primarily include the main dosage system. During maintenance, the starting device and the mechanism for maintaining a certain level of fuel also require attention. The driver, in addition, performs idle adjustment.
Fuel level
Setting up the K-68 carburetor can begin by checking the fuel level in the float section. To perform this procedure, you must prepare the necessary tool. With it, you need to dismantle the carburetor. Next, a cover is removed that closes the float chamber.
The carburetor must be turned over. The floats will now be on top. The owner of the motorcycle must measure the distance from the top edge of the floats to the edge of the body. Ideally, it will be 26 mm. Allowed deviation in both directions by 0.5 mm. If the indicator does not correspond to the standard, it is necessary to adjust the position of the floats. To do this, the tongue needs to be slightly bent.
The floats should also be parallel. If this is not the case, they are bent with a bracket.
Candle inspection
Adjusting the K-68 carburetor also involves evaluating the appearance of the candles. To do this, drive a minimum of 30 km along the highway. In this case, the speed should be medium or high. After that, you can study the candles. If soot forms on them, this indicates an insufficient amount of air in the fuel. This is a rich mixture.
It happens that the insulator is completely white. This indicates a poor fuel mixture. The normal color of the candles ranges from red-orange to sand. If so, then a single-chamber carburetor does not need to be tuned.
Based on the obtained observation results, the driver decides on further actions. Sometimes you only need to make adjustments, but sometimes you may need to clean the carburetor. In this case, the device is completely dismantled, disassembled and washed.
Stop valve
Checking the K-68 carburetor requires attention to the shutoff valve. It is also called a needle. If the valve is leaking, the level of gasoline in the mixture may rise. This produces a rich mixture.
The needle valve of the K-68 carburetor can have a rubber cone or a ring in its design. To check the condition of this element, you must remove the cover at the bottom. It is attached to the body with two bolts. When removing the fasteners, make sure that they do not damage the gasket.
Then the float is removed. To do this, gently squeeze its core out of the grooves. The needle may fall out. Therefore, it is necessary to monitor it so as not to accidentally lose such an important element. If the rubber ring or cone is worn, it is necessary to replace them. The needle also has to move on a saddle without failures.
Fuel level adjustment in the Urals
Adjusting the carburetor of the Ural motorcycle with certain skills can be done without removing the block itself. Due to the nature of the installation, some difficulties with dismantling may occur. The carburetor in this motorcycle is located on the cylinder heads at an angle to both the horizontal and vertical plane.
To make the adjustment, you need a float from the same device. The motorcycle must be mounted on a stand. Then a gas crane opens. You need to wait a while. Carburetors will fill with fuel. Then the gas cock is closed. The hose is disconnected from the carburetor.
The bottom cover filled with gasoline must be removed. A spare float is lowered into it. The lid must be leaned against the body so that their planes become a continuation of each other. The fuel level should be under the rim of the lower corner of the cover. If this is not observed, you need to bend the tongue.
Idle adjustment
Adjustment of the carburetor of the Ural , Dnipro and other vehicles is first idle. To do this, the engine must be warmed up. Further, at idle, it is necessary to establish stable speed. To do this, rotate the horizontal screw, which is turned with a screwdriver.
Next, set the quality screw. This will also require a suitable size screwdriver. You must find the vertical screw. When you configure it, you must catch the moment of increasing the number of revolutions to the maximum level. This action is repeated until a stable idle engine is established.
Check the settings by closing and opening the throttle. If gas is given abruptly, if the setting is incorrect, the motor will stall. This means that the screw must be tightened (enrich the mixture). When the damper closes abruptly, the engine stalls due to a too rich fuel mixture. The screw needs to be slightly unscrewed.
Main dosing system
Adjusting the K-68 carburetor also requires adjusting the metering needle and its position. You need to ride a motorcycle for some distance. On a straight section of the route, you need to evaluate how the vehicle responds to the gas handle. If weak, the needle is raised up one division. If after the trip the candles will be soot, they lower it.
This setting will ensure stable engine operation at medium speeds. They are most often driven by drivers. To adjust the carburetor at maximum speed, you must correctly select the cross section of the nozzle. Only it works with the throttle stick turned out all the way.
Having considered the principles of tuning and servicing the K-68 carburetor , each owner of a domestic motorcycle will be able to carry out the adjustment on their own. The fuel consumption, as well as the operation of the main vehicle systems, depends on the correct execution of this process.